src/music.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file music.cpp The songs that OpenTTD knows. */
   9
  10 #include "stdafx.h"
  11
  12
  13 /** The type of set we're replacing */
  14 #define SET_TYPE "music"
  15 #include "base_media_func.h"
  16
  17 #include "safeguards.h"
  18 #include "random_access_file_type.h"
  19
  20
  21 /**
  22  * Read the name of a music CAT file entry.
  23  * @param filename Name of CAT file to read from
  24  * @param entrynum Index of entry whose name to read
  25  * @return Pointer to string, caller is responsible for freeing memory,
  26  *         nullptr if entrynum does not exist.
  27  */
  28 char *GetMusicCatEntryName(const char *filename, size_t entrynum)
  29 {
  30         if (!FioCheckFileExists(filename, BASESET_DIR)) return nullptr;
  31
  32         RandomAccessFile file(filename, BASESET_DIR);
  33         uint32 ofs = file.ReadDword();
  34         size_t entry_count = ofs / 8;
  35         if (entrynum < entry_count) {
  36                 file.SeekTo(entrynum * 8, SEEK_SET);
  37                 file.SeekTo(file.ReadDword(), SEEK_SET);
  38                 byte namelen = file.ReadByte();
  39                 char *name = MallocT<char>(namelen + 1);
  40                 file.ReadBlock(name, namelen);
  41                 name[namelen] = '\0';
  42                 return name;
  43         }
  44         return nullptr;
  45 }
  46
  47 /**
  48  * Read the full data of a music CAT file entry.
  49  * @param filename Name of CAT file to read from.
  50  * @param entrynum Index of entry to read
  51  * @param[out] entrylen Receives length of data read
  52  * @return Pointer to buffer with data read, caller is responsible for freeind memory,
  53  *         nullptr if entrynum does not exist.
  54  */
  55 byte *GetMusicCatEntryData(const char *filename, size_t entrynum, size_t &entrylen)
  56 {
  57         entrylen = 0;
  58         if (!FioCheckFileExists(filename, BASESET_DIR)) return nullptr;
  59
  60         RandomAccessFile file(filename, BASESET_DIR);
  61         uint32 ofs = file.ReadDword();
  62         size_t entry_count = ofs / 8;
  63         if (entrynum < entry_count) {
  64                 file.SeekTo(entrynum * 8, SEEK_SET);
  65                 size_t entrypos = file.ReadDword();
  66                 entrylen = file.ReadDword();
  67                 file.SeekTo(entrypos, SEEK_SET);
  68                 file.SkipBytes(file.ReadByte());
  69                 byte *data = MallocT<byte>(entrylen);
  70                 file.ReadBlock(data, entrylen);
  71                 return data;
  72         }
  73         return nullptr;
  74 }
  75
  76 INSTANTIATE_BASE_MEDIA_METHODS(BaseMedia<MusicSet>, MusicSet)
  77
  78 /** Names corresponding to the music set's files */
  79 static const char * const _music_file_names[] = {
  80         "theme",
  81         "old_0", "old_1", "old_2", "old_3", "old_4", "old_5", "old_6", "old_7", "old_8", "old_9",
  82         "new_0", "new_1", "new_2", "new_3", "new_4", "new_5", "new_6", "new_7", "new_8", "new_9",
  83         "ezy_0", "ezy_1", "ezy_2", "ezy_3", "ezy_4", "ezy_5", "ezy_6", "ezy_7", "ezy_8", "ezy_9",
  84 };
  85 /** Make sure we aren't messing things up. */
  86 static_assert(lengthof(_music_file_names) == NUM_SONGS_AVAILABLE);
  87
  88 template <class T, size_t Tnum_files, bool Tsearch_in_tars>
  89 /* static */ const char * const *BaseSet<T, Tnum_files, Tsearch_in_tars>::file_names = _music_file_names;
  90
  91 template <class Tbase_set>
  92 /* static */ const char *BaseMedia<Tbase_set>::GetExtension()
  93 {
  94         return ".obm"; // OpenTTD Base Music
  95 }
  96
  97 template <class Tbase_set>
  98 /* static */ bool BaseMedia<Tbase_set>::DetermineBestSet()
  99 {
 100         if (BaseMedia<Tbase_set>::used_set != nullptr) return true;
 101
 102         const Tbase_set *best = nullptr;
 103         for (const Tbase_set *c = BaseMedia<Tbase_set>::available_sets; c != nullptr; c = c->next) {
 104                 if (c->GetNumMissing() != 0) continue;
 105
 106                 if (best == nullptr ||
 107                                 (best->fallback && !c->fallback) ||
 108                                 best->valid_files < c->valid_files ||
 109                                 (best->valid_files == c->valid_files &&
 110                                         (best->shortname == c->shortname && best->version < c->version))) {
 111                         best = c;
 112                 }
 113         }
 114
 115         BaseMedia<Tbase_set>::used_set = best;
 116         return BaseMedia<Tbase_set>::used_set != nullptr;
 117 }
 118
 119 bool MusicSet::FillSetDetails(IniFile *ini, const char *path, const char *full_filename)
 120 {
 121         bool ret = this->BaseSet<MusicSet, NUM_SONGS_AVAILABLE, false>::FillSetDetails(ini, path, full_filename);
 122         if (ret) {
 123                 this->num_available = 0;
 124                 IniGroup *names = ini->GetGroup("names");
 125                 IniGroup *catindex = ini->GetGroup("catindex");
 126                 IniGroup *timingtrim = ini->GetGroup("timingtrim");
 127                 uint tracknr = 1;
 128                 for (uint i = 0; i < lengthof(this->songinfo); i++) {
 129                         const char *filename = this->files[i].filename;
 130                         if (names == nullptr || StrEmpty(filename) || this->files[i].check_result == MD5File::CR_NO_FILE) {
 131                                 this->songinfo[i].songname[0] = '\0';
 132                                 continue;
 133                         }
 134
 135                         this->songinfo[i].filename = filename; // non-owned pointer
 136
 137                         IniItem *item = catindex->GetItem(_music_file_names[i], false);
 138                         if (item != nullptr && item->value.has_value() && !item->value->empty()) {
 139                                 /* Song has a CAT file index, assume it's MPS MIDI format */
 140                                 this->songinfo[i].filetype = MTT_MPSMIDI;
 141                                 this->songinfo[i].cat_index = atoi(item->value->c_str());
 142                                 char *songname = GetMusicCatEntryName(filename, this->songinfo[i].cat_index);
 143                                 if (songname == nullptr) {
 144                                         Debug(grf, 0, "Base music set song missing from CAT file: {}/{}", filename, this->songinfo[i].cat_index);
 145                                         this->songinfo[i].songname[0] = '\0';
 146                                         continue;
 147                                 }
 148                                 strecpy(this->songinfo[i].songname, songname, lastof(this->songinfo[i].songname));
 149                                 free(songname);
 150                         } else {
 151                                 this->songinfo[i].filetype = MTT_STANDARDMIDI;
 152                         }
 153
 154                         const char *trimmed_filename = filename;
 155                         /* As we possibly add a path to the filename and we compare
 156                          * on the filename with the path as in the .obm, we need to
 157                          * keep stripping path elements until we find a match. */
 158                         for (; trimmed_filename != nullptr; trimmed_filename = strchr(trimmed_filename, PATHSEPCHAR)) {
 159                                 /* Remove possible double path separator characters from
 160                                  * the beginning, so we don't start reading e.g. root. */
 161                                 while (*trimmed_filename == PATHSEPCHAR) trimmed_filename++;
 162
 163                                 item = names->GetItem(trimmed_filename, false);
 164                                 if (item != nullptr && item->value.has_value() && !item->value->empty()) break;
 165                         }
 166
 167                         if (this->songinfo[i].filetype == MTT_STANDARDMIDI) {
 168                                 if (item != nullptr && item->value.has_value() && !item->value->empty()) {
 169                                         strecpy(this->songinfo[i].songname, item->value->c_str(), lastof(this->songinfo[i].songname));
 170                                 } else {
 171                                         Debug(grf, 0, "Base music set song name missing: {}", filename);
 172                                         return false;
 173                                 }
 174                         }
 175                         this->num_available++;
 176
 177                         /* Number the theme song (if any) track 0, rest are normal */
 178                         if (i == 0) {
 179                                 this->songinfo[i].tracknr = 0;
 180                         } else {
 181                                 this->songinfo[i].tracknr = tracknr++;
 182                         }
 183
 184                         item = trimmed_filename != nullptr ? timingtrim->GetItem(trimmed_filename, false) : nullptr;
 185                         if (item != nullptr && item->value.has_value() && !item->value->empty()) {
 186                                 auto endpos = item->value->find(':');
 187                                 if (endpos != std::string::npos) {
 188                                         this->songinfo[i].override_start = atoi(item->value->c_str());
 189                                         this->songinfo[i].override_end = atoi(item->value->c_str() + endpos + 1);
 190                                 }
 191                         }
 192                 }
 193         }
 194         return ret;
 195 }